h) transport

How does root hair cells absorb water?

By osmosis since there’s a higher concentration of water in the soil than the plant.

What is transpiration and how is it caused?

It’s the loss of water from a plant which is caused by evaporation and diffusion of water from a plant’s surface.

What are the 4 factors that affect transpiration rate?

Light intensity

Temperature

Wind speed

Humidity

How does light intensity affect transportation rate?

Brighter the light great, greater the transpiration rate.

How does temperature affect transpiration rate?

Warmer the temperature, greater the transpiration rate.

How does wind speed affect transpiration rate?

Higher the wind speed, greater the transpiration rate.

How does humidity affect transpiration rate?

Drier the air, faster the transpiration rate is.

How can you investigate how environmental factors affect rate of transpiration rate from a leafy shoot?

Light intensity: Use a lamp to increase . To decrease put potometer in cupboard.

Temperature: put in room warmer/colder than control experiment.

Wind speed: Use a fan to increase.

Humidity: spray water in clear bag then seal it around plant to increase humidity.

How do vaccinations protect you from future infections?

Vaccination involves injecting dead or inactive pathogens to your body.

They’re harmless but still trigger immune response so lymphocytes send antibodies to attack them.

Memory cells are also produced so if live pathogens of same type appear antibodies are there to kill them.

How are platelets involved in blood clotting?

They clump together to plug damaged area which stop microorganism entering the wound and stop too much blood loss.